| Name | Meaning | Gender | Origin |
|---|
| Norman | man from the north | Male | English |
| Olga | holy | Female | Russian |
| Olive | kind one; olive tree, peace. Symbol of peace. A small oval fruit. | Female | English |
| Oliver | The olive tree. The biblical olive tree symbolizes fruitfulness and beauty and dignity. Extending an olive branch signifies an offer of peace.
| Male | Latin |
| Ollie | Latin, olive tree | Male | English |
| Opal | Australian gemstone of remarkable colours, usually red, blue or green | Female | Sanskrit |
| Opal | Australian gemstone of remarkable colours, usually red, blue or green | Female | Sanskrit |
| Orville | Gold town.
| Male | |
| Oscar | God's spear.
| Male | English |
| Otis | Wealthy.
| Male | |
| Otto | Born eighth or wealthy
| Male | |
| Oz | strength | Male | Hebrew |
| Pamela | honeyed | Female | English |
| Patrick | Patrician: noble. Romans society was divided into plebeians: (commoners) and patricians: (aristocrats). Saint Patrick - patron saint of Ireland.
| Male | Latin |
| Paul | small | Male | Latin |
| Paula | small | Female | Feminine |
| Pearl | Precious jewel. A hard, rounded gem, usually white in colour | Female | Latin |
| Peggy | pearl | Female | English |
| Penelope | Dream weaver
| Female | Greek |
| Penny | Greek, weaver | Female | English |
| Percy | | Male | |
| Perry | French form of Peter
| Male | English |
| Pete | A rock. Form of Peter.
| Male | English |
| Peter | A rock. Peter the biblical fisherman and apostle had impulsive nature and rocklike faith. In Catholic tradition he is the first pope.
| Male | Greek |
| Philip | horse lover | Male | Greek |